pi‧o‧neer‧ing /ˌpaɪəˈnɪərɪŋ◂ $ -ˈnɪr-/
adjective [only before noun] introducing new and better methods or ideas for the first time
pioneering work/research/efforts etc
the pioneering work of NASA scientists She played a pioneering role in opening higher education to women. [TahlilGaran] Dictionary of Contemporary English ▲